Comparison of a Measuring Scale With Hertel’s Exophthalmometer in a Pakistani Adult Population

Usman  Tariq; Muhammad  Shahid; Fawad Ahmad  Khan; M Kamran  Haider; Muhammad  Jahanzaib; Abdul  Rauf

doi:10.51253/pafmj.v76iSUPPL-1.12213

Authors

Usman Tariq Department of Ophthalmology, Armed Forces Institute of Ophthalmology Rawalpindi/National University of Medical Sciences (NUMS) Pakistan
Muhammad Shahid Department of Ophthalmology, Armed Forces Institute of Ophthalmology Rawalpindi/National University of Medical Sciences (NUMS) Pakistan
Fawad Ahmad Khan Department of Ophthalmology, Armed Forces Institute of Ophthalmology Rawalpindi/National University of Medical Sciences (NUMS) Pakistan
M Kamran Haider Department of Ophthalmology, Armed Forces Institute of Ophthalmology Rawalpindi/National University of Medical Sciences (NUMS) Pakistan
Muhammad Jahanzaib Department of Ophthalmology, Armed Forces Institute of Ophthalmology Rawalpindi/National University of Medical Sciences (NUMS) Pakistan
Abdul Rauf Department of Ophthalmology, Armed Forces Institute of Ophthalmology Rawalpindi/National University of Medical Sciences (NUMS) Pakistan

DOI:

https://doi.org/10.51253/pafmj.v76iSUPPL-1.12213

Keywords:

Exophthalmos, Exophthalmometry, Hertel’s, Luedde’s, Measuring scale

Abstract

Objective: To compare Measuring Scale (Modified Luedde’s exophthalmometer) values with Hertel’s exophthalmometer and assess their correlation and interchangeability in clinical practice.

Study Design: Cross-sectional study

Place and Duration of Study: Armed Forces Institute of Ophthalmology (AFIO), Rawalpindi, Pakistan, from Nov 2023 to Apr 2024.

Methodology: A total of 26 patients were enrolled in the study. Exophthalmometry was performed using a Measuring Scale and Hertel’s exophthalmometer on the right eye of adult participants on the same day. Exophthalmometry readings were obtained and analyzed using paired sample t-tests and Bland–Altman plots.

Results: A total of 26 participants were included with a median age of 55 years, with an interquartile range (IQR) of 37-62 years. Mean Hertel’s and Measuring Scale values were 17.81±1.96 mm and 17.77±2.02 mm, respectively. There was no statistical difference between Hertel’s and measuring scale (modified Luedde’s exophthalmometer) measurements (p=0.753).

Conclusion: Hertel’s and Scale measurements are reasonably similar, and there is a statistically significant correlation between the Exophthalmometry measurements observed. Therefore, they can be used interchangeably clinically in resource-limited settings.

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